If it's just the 4x4 sensor, it might just be the steering angle sensor. I repaired mine recently and it's been good since. Cost me $0.


https://xoutpost.com/bmw-sav-forums/...r-fix-0-a.html

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'04 X5 3.0 5AT with 300,000+km - Black
'08 535xi 6AT with 290,000+km - Titanium Silver